Great news , Pauline @flof1952 😊. Thank you for reminding me as I haven't fed them for a while . I usually feed them with ericaceous plant food. They like leaf mould and any other organic material , too.
Thank you so much 😊 , Pauline @flof1952 , Nicola @jendren and Jane @pelly . I'm keeping these in a medium size pot . I used John Innes Ericaceous Compost with lots of added grit . They were only large plug plants early April and I made sure they received lot of early spring sun. They are kept moist and away from the strong midday sun right now. I am not going to let them set seeds after flowering so they can become stronger plants for the winter ahead. I think good drainage is the key .